I developed the sketch using my iPad, and then imported it into Photoshop to refine and complete. During my painting process, ...

Open the Notes app on your iPad or iPhone and select the ... app and replaced with the existing sketch or drawing. If you want to generate an image from scratch, select the empty space, circle ...

The image import tool is worth mentioning ... but Fresco is available on the iPhone too. Given a choice between drawing on an iPad or an iPhone, the iPad wins every time because of its greater screen ...